Add support for resolving translation bindings at compile time

Add support for resolving translation bindings at compile time

Simple calls to qsTr and qsTrId are detected at type compile time and
reduced to a special Translation and TranslationById binding type, which
avoids allocating a QML binding at type instantiation type just to perform
a translation.

Change-Id: I61e4f2db2a8092b5e6870e174b832d9c20cd62b5
Reviewed-by: Lars Knoll <lars.knoll@digia.com>